From e10abf4cf3fc32d966d40848e6d8d5b1c1a55201 Mon Sep 17 00:00:00 2001
From: m <paragraphenreiter@gmail.com>
Date: Sat, 7 Feb 2026 12:26:30 +0100
Subject: [PATCH] Add preserveDrawingBuffer for reliable PNG screenshot export

Without this flag, toDataURL() on the WebGL canvas can return blank
in some browsers because the drawing buffer gets cleared.
---
 src/renderer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/renderer.js b/src/renderer.js
index e68089d..bf1995c 100644
--- a/src/renderer.js
+++ b/src/renderer.js
@@ -43,7 +43,7 @@ export class HouseRenderer {
     this.camera.position.set(6, 12, 14);
     this.camera.lookAt(6, 0, 5);
 
-    this.renderer = new THREE.WebGLRenderer({ antialias: true });
+    this.renderer = new THREE.WebGLRenderer({ antialias: true, preserveDrawingBuffer: true });
     this.renderer.setSize(container.clientWidth, container.clientHeight);
     this.renderer.setPixelRatio(window.devicePixelRatio);
     this.renderer.shadowMap.enabled = true;